--
An error occurred while reading "/Users/nmk/Music/sets/stellamix Project/stellamix.als." Apparently, the dcument was created by a more recent, and incompatible, version of Live than this.
[Wrong class found. Expected a "Document" or subclass, found a "LivePerferences"]
--
Ableton 6.0.10 on osx
It was session with lots of mp3s for a DJ mix.